| 5588058 |
Method and device for scrambling and descrambling of a specific television broadcast |
| Dec-24-1996 |
A receiving device comprises a pseudo-random generator (18) initialized by a control word (CW) and a memory card reader (19). In accordance with the invention, it reads control word in a table of numbers... |
| 5579390 |
Method and apparatus for vertically scrambling and descrambling of video signals |
| Nov-26-1996 |
A video-scrambling system induces a random wobble i.e., time shifting, in the location of active portion of the video frame, without affecting the horizontal sync signal and colorburst in each video line,... |
| 5381481 |
Method and apparatus for uniquely encrypting a plurality of services at a transmission site |
| Jan-10-1995 |
Methods and apparatus are described for uniquely encrypting a plurality services at a transmission site and for decrypting selected services at a reception site while reducing the amount of encryption... |
| 7010685 |
Method and apparatus for storing scrambled digital programs by filtering product identifier |
| Mar-7-2006 |
In accordance with one embodiment, a method for storing a normal scrambled digital program is provided. The method includes receiving a scrambled program, and receiving a plurality of access requirements.... |
| 6697489 |
Method and apparatus for securing control words |
| Feb-24-2004 |
In accordance with one embodiment, a method for securing control words is provided. The method includes receiving scrambled digital content in a descrambler integrated circuit. The method further includes... |
| 6959089 |
Method and apparatus for secure transmission of data |
| Oct-25-2005 |
An apparatus and method are utilized for transmitting data across an interface between a sender and a receiver. The sender and receiver can be provided with a shared key, a receiver—key... |
| 6904522 |
Method and apparatus for secure communication of information between a plurality of digital audiovisual devices |
| Jun-7-2005 |
The present invention relates to a method of providing secure communication of information between at least a first and second digital audiovisual device (30, 52) and characterized in that the first device... |
| 4535355 |
Method and apparatus for scrambling and unscrambling data streams using encryption and decryption |
| Aug-13-1985 |
Methods and apparatus for scrambling and unscrambling a plurality of data streams having differing data, on a plurality of signal channels, are taught. The data streams may be television programs or other... |
| 5438620 |
Method and apparatus for scrambling and descrambling of video signal with edge fill |
| Aug-1-1995 |
A video-scrambling system induces a random wobble i.e., time shifting, in the location of active portion of the video frame, without affecting the horizontal sync signal and colorburst in each video line,... |
| 4998278 |
Method and apparatus for scramble type broadcast receiving with contract management and scramble type broadcasting system |
| Mar-5-1991 |
A method and an apparatus for scramble type broadcast receiving capable of proper contract management and strict prevention of illegitimate program receptions. The method includes the steps of deciphering... |
| 6987854 |
Method and apparatus for recording of encrypted digital data |
| Jan-17-2006 |
A method of transmitting and recording digital data scrambled using a control word. The scrambled data is transmitted together with the control word, and the method includes encrypting the control word... |
| 5870474 |
Method and apparatus for providing conditional access in connection-oriented, interactive networks with a multiplicity of service providers |
| Feb-9-1999 |
A control system provides secure transmission of programs, including at least one of video, audio, and data, between a service provider and a customer's set top unit over a digital network. Program bearing... |
| 6424714 |
Method and apparatus for providing conditional access in connection-oriented interactive networks with a multiplicity of service providers |
| Jul-23-2002 |
A control system provides secure transmission of programs, including at least one of video, audio, and data, between a service provider and a customer's set top unit over a digital network. Program bearing... |
| 6873853 |
Method and apparatus for providing commercial broadcasting service in cellular mobile communication network |
| Mar-29-2005 |
A method and an apparatus for providing only authorized mobile subscribers with a specified commercial broadcasting service in a cellular mobile communication network. A base station transmits a control... |
| 6145081 |
Method and apparatus for preventing removal of embedded information in cover signals |
| Nov-7-2000 |
Apparatus and methods are provided for embedding watermark information into a cover signal, such as an audio signal, video signal, or still image signal, in a manner that prevents the watermark information... |
| 5485577 |
Method and apparatus for incremental delivery of access rights |
| Jan-16-1996 |
Incremental delivery of authenticated access rights to an access control processor is provided. Subgroups of the access rights are communicated to the processor in a plurality of messages. The subgroups... |
| 5671276 |
Method and apparatus for impulse purchasing of packaged information services |
| Sep-23-1997 |
Impulse purchasing is provided for packages of services offered to consumers via an information network. A plurality of services is offered for individual purchase on an impulse basis via a user terminal... |
| 6744892 |
Method and apparatus for geographically limiting service in a conditional access system |
| Jun-1-2004 |
A cable television system provides conditional access to services. The cable television system includes a headend from which service "instances", or programs, are broadcast and a plurality of set top units... |
| 6560340 |
Method and apparatus for geographically limiting service in a conditional access system |
| May-6-2003 |
A cable television system provides conditional access to services. The cable television system includes a headend from which service "instances", or programs, are broadcast and a plurality of set top units... |
| 5594794 |
Method and apparatus for free previews of communication network services |
| Jan-14-1997 |
Limited duration previews of program offerings available for purchase via a communication network are provided in a cryptographically secure manner at virtually any time during the service. The invention... |
| 6543050 |
Method and apparatus for enlarging DVB-CI functionality by enabling a direct access to the conditional access module |
| Apr-1-2003 |
The invention is to be used in the Digital Video Broadcasting--Common Interface environment for accessing the Conditional Access Module (CAM). The host application handles objects of the Conditional Access... |
| 5243650 |
Method and apparatus for encryption/decryption of digital multisound in television |
| Sep-7-1993 |
The present invention relates to methods and apparatus for encryption and decryption, respectively, of digital sound in television. The decryption takes place in two steps. The first step, encryption with... |
| 6069956 |
Method and apparatus for encrypting multiplexed data streams using key information continued in streams |
| May-30-2000 |
In a communication network in which data for transmission to a receiver terminal is multiplexed on a time-division basis and scrambled, a communication control apparatus and method for allowing the data... |
| 6021197 |
Method and apparatus for controlling the operation of a signal decoder in a broadcasting system |
| Feb-1-2000 |
In a method and apparatus for controlling the operation of a signal decoder in a broadcasting system, a broadcast signal and an encrypted signature are generated and the signature is added to the signal.... |
| 6745245 |
Managing access to set-top box objects using television conditional access system |
| Jun-1-2004 |
Methods for using a conditional access system to modify access control information maintained at a set-top box or another client system. The access control information regulates the availability of information... |
| 5022079 |
Lock means and TV sync for air-to-surface missile |
| Jun-4-1991 |
1. A digital code synchronization locking means comprising: means to receive a first digital code sequence; means to generate a second digital code sequence substantially similar to id first sequence,... |
| 5351294 |
Limited broadcast system |
| Sep-27-1994 |
A method and apparatus for carrying out limited encipherment broadcast by generating a cipher key obtained from destination information added to service information are provided. An information service... |
| 6427013 |
Information broadcasting method, receiver, and information processing apparatus |
| Jul-30-2002 |
An information broadcasting method, a receiver, and an information processing apparatus make it possible to secure safety of information transmission between an information center and information. By encrypting... |
| 5237610 |
Independent external security module for a digitally upgradeable television signal decoder |
| Aug-17-1993 |
A decoder for descrambling encoded satellite transmissions comprises an internal security module and a resplaceable security module. The program signal is scrambled with a key and then the key itself is... |
| 5583938 |
Image signal scrambling apparatus and descrambling apparatus |
| Dec-10-1996 |
An object of the invention is to provide an image scrambling apparatus and an image descrambling apparatus capable of making a communication of secrecy by scrambling a digital image signal as well as variable-length-encoding... |
| 5933499 |
Image processing apparatus |
| Aug-3-1999 |
An image processing apparatus separates input image data into low resolution image data and one or more auxiliary image data for interpolating the low resolution image data, and decrypts at least one of... |
| 4908834 |
High security pay television system |
| Mar-13-1990 |
A high security pay television system is provided in which television receivers include a decoder and with periodically changed removable memory modules. The decoder only functions to properly descramble... |
| 4907273 |
High security pay television system |
| Mar-6-1990 |
A high security pay television system is provided in which subscribers are provided with a decoder and with periodically changed removable memory modules. The decoder only functions to properly descramble... |
| 4807286 |
High security pay television system |
| Feb-21-1989 |
A high security pay television system is provided in which television receivers include a decoder and with periodically changed removable memory modules. The decoder only functions to properly descramble... |
| 4696034 |
High security pay television system |
| Sep-22-1987 |
A high security pay television system is provided in which subscribers are provided with a decoder and with periodically changed removable memory modules. The decoder only functions to properly descramble... |
| 6907127 |
Hierarchical key management encoding and decoding |
| Jun-14-2005 |
The present invention discloses a construction for key management module functionality which provides for secure encoding and decoding of messages which are up to two blocks long. A method for generating... |
| 5754659 |
Generation of cryptographic signatures using hash keys |
| May-19-1998 |
A method and apparatus are provided for generating a digital signature that authenticates information of a plurality of different information groups. Information from each group is hashed to produce a... |
| 5003591 |
Functionally modifiable cable television converter system |
| Mar-26-1991 |
A cable television converter with remotely modifiable functionality receives firmware downloaded over a cable television network. The integrity of the firmware is verified, and if valid, the firmware is... |
| 6870932 |
Frame number identification and ciphering activation time synchronization for a wireless communications protocol |
| Mar-22-2005 |
A received PDU is sequentially identified by an n-bit frame number (FN) and an m-bit hyper frame number (HFN), which are synchronously maintained on first and second stations. The second station determines... |
| 6853727 |
File table copy protection for a storage device when storing streaming content |
| Feb-8-2005 |
Copy protection is provided at a mass storage device provided in or connected to a decoder for receiving digital transmissions of audio and video program material by virtual scrambling of blocks of data.... |
| 6853727 |
File table copy protection for a storage device when storing streaming content |
| Feb-8-2005 |
Copy protection is provided at a mass storage device provided in or connected to a decoder for receiving digital transmissions of audio and video program material by virtual scrambling of blocks of data.... |
| 5029207 |
External security module for a television signal decoder |
| Jul-2-1991 |
A decoder for descrambling encoded satellite transmissions comprises an internal security element and a replaceable security module. The program signal is scrambled with a key and then the key itself is... |
| 5799083 |
Event verification system |
| Aug-25-1998 |
An event verification system comprises an input for the reception of information and an encryption algorithm to encrypt the information; an electronic recorder to record the encrypted information and a... |
| 6424717 |
Encryption devices for use in a conditional access system |
| Jul-23-2002 |
A cable television system provides conditional access to services. The cable television system includes a headend from which service "instances", or programs, are broadcast and a plurality of set top units... |
| 5553141 |
Encryption and decryption (scrambling and unscrambling) of video signals |
| Sep-3-1996 |
A video signal is encrypted by pseudo-random variation of portions of lines thereof to be horizontally scanned that are devoid of video information. Thus, the durations of line blanking intervals may be... |
| 6028933 |
Encrypting method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network |
| Feb-22-2000 |
The specification relates to the encryption of data transmitted over a broadband multiple access bi-directional hybrid fiber/coax (HFC) network. The method supports downstream broadcast encryption from... |
| 4736422 |
Encrypted broadcast television system |
| Apr-5-1988 |
A conditional access system for transmitting and receiving scrambled television signals over-air includes means for addressing each of the receiving apparatus with an over-air signal whereby to permit... |
| 4658292 |
Enciphering key distribution system for subscription TV broadcast or catv system |
| Apr-14-1987 |
An enciphering key distribution system comprises a transmitter having an address generator for generating the addresses of those subscribers to which a first enciphered TV signal is to be distributed.... |
| 6256391 |
Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and method |
| Jul-3-2001 |
The invention provides an enciphering apparatus and method, a deciphering apparatus and method and an information processing apparatus and method by which illegal copying can be prevented with certainty.... |
| 5218638 |
Encipher method and decipher method |
| Jun-8-1993 |
A method and apparatus for carrying out limited encipherment broadcast by generating a cipher key obtained from destination information added to service information are provided. An information service... |
